Researchers who were studying the effects of music on plant growth raised plants in two different rooms.One room had soft music playing 24 hours a day; the other room had no music.In this study, the control group is:
A) the plants in the room with no music
B) the plants in the room with the music
C) the plants that grow the most during the study
D) all the plants used during the study
Correct Answer:
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